have an overactive gallbladder, and cannot eat certain foods. ate one of those trigger foods on mothers day and had abdominal pain similiar to a burning sensation in upper right quadrant of abdomen. took prilosec to try and help, two hours later was still in pain and had loose-dierrhea like black stools. happened 4 more times into the night, could not eat anything last night or for most of today. at work my stomach felt dull and achy whenever i bent over or lifted something up. someone mentioned the black stool could be a result of internal bleeding. have had a endoscopy and colonoscopy 3 years ago, but nothing came up. should i be concerned about possible bleeding?